In the entire history of the moral evolution of humanity there is no chapter which reveals so plainly the upward trend of the ethical movement in civilization as that which tells the story of the beginnings and the final suppression of the African slave trade, and of the rise and fall of the institution of negro slavery among Christian peoples.[753] Restricting our survey for the moment to the slave trade as distinct from slavery, the amazing fact which meets us here at the outset is that until late in the modern period the peoples of Western Christendom had practically no conscience whatsoever in regard to the African slave trade, and this notwithstanding that the conscience of the age was in many other matters true and sensitive. The whole subject lay practically outside the realm of morals. The slave trade was looked upon as a perfectly legitimate business.[754] Practically no one thought it wrong to go to Africa, kidnap or purchase a shipload of the natives, bring them in stifling holds--where sometimes half the unhappy victims died on the passage--to the West Indies or to the Spanish and English mainland of the Americas and sell them as slaves.[755] What little opposition to the traffic existed, arose in general from other than feelings of moral disapproval.[756] The movement for the abolition of the trade constitutes an important phase of the social and moral life, particularly of England and of the English colonies in America, during the latter part of the eighteenth century and the earlier part of the nineteenth. In England the wave of humanitarian feeling which swept away the obstacles set in the way of the abolition of the traffic by selfish interests was raised by the great religious revival led by Whitefield and the Wesleys. The leaders of the reform were Thomas Clarkson and William Wilberforce. After twenty years of agitation a bill was passed abolishing the trade (1807). This marked as great a moral victory as ever was won in the English Parliament, for it was the aroused moral sentiment of the nation which was the main force that carried the reform measure through the Houses. In America there had arisen among the Quakers of Pennsylvania, even before the Revolution, a protest against the trade on purely moral grounds. By the time the Federal Convention met in 1787 sufficient sentiment had been developed in the matter to secure the adoption of a provision in the Constitution to the effect that the importation of slaves should cease in 1808. From that year on, the slave trade, as distinct from slavery, was under the ban both of the law and of the public conscience; but it continued to be carried on clandestinely until the Civil War. [Sidenote: (_b_) As manifested in the antislavery movement]